#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#===============================================================================
# Copyright 2011 zod.yslin
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# 
# Author: zod.yslin
# Email: 
# File Name: super.py
# Description: 
#   super([type[, object-or-type]]) 用為呼叫父類別定義的方法
# Edit History: 
#   2011-09-13    File created.
#===============================================================================
class Demo:
    __x = 0
 
    def __init__(self, i):
        self.__i = i
        Demo.__x += 1
     
    def __str__(self):
        return str(self.__i)
          
    def hello(self):
        print("hello " + self.__str__())
     
    @classmethod
    def getX(cls):
        return cls.__x
 
class SubDemo(Demo):
    def __init__(self, i, j):
        super().__init__(i)
        self.__j = j
     
    def __str__(self):
        return super().__str__() + "+" + str(self.__j)
 
 
a = SubDemo(12, 34)
a.hello()
print("a.__x =", a.getX())
b = SubDemo(56, 78)
b.hello()
print("b.__x =", b.getX())
print()
print("a.__x =", a.getX())
print("b.__x =", b.getX())
